Most celebrities consider it an honor to do a voice on The Simpsons, but not everyone is so eager. Here are 32 actors, musicians, and politicians who either turned down a role on the show or were cut from their episode.

In 1981, the show’s biggest musical mistake was hosting an obscure L.A. punk band who caused a riot in the studio. In 2004, it was allowing Ashlee Simpson to lip-synch. Here’s a look at everything else that’s changed over the years.